Tests
Electrolyte tests
Electrolyte tests
Checks sodium, potassium and other electrolyte levels.
Sources checked · Introductory guide
On this page
What does the test do?
Blood tests assess minerals needed for fluid balance, nerves, muscles and heart function.[1]
Understanding results
Vomiting, diarrhea, medicines and kidney health can affect results.[1]
Before the test
Check fasting instructions; do not increase electrolyte supplements without advice.[1]
Questions for your care team
- Which electrolytes need attention and when should they be rechecked?
Sources and scope
Source documents are in English.
Entries summarize and translate linked official public sources. The source-check date records when those sources were checked; it does not indicate a clinician’s review.
General information based on official public sources. This is not a complete list of uses or side effects. Individual treatment decisions require your care team and current source documents. US-source uses do not establish local approval or reimbursement.